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To prevent data losses and service interruptions caused by natural disasters or human misconduct, we need to leverage periodic disaster backup among geographically distributed multiple datacenters. Previous works aimed at bandwidth allocation to achieve maximum network flow for every backup pair one by one or fair load distribution for backup datacenters respectively, without jointly optimizing the...
User-perceived quality-of-experience (QoE) is critical in Internet video delivery systems. Many previous efforts have studied the design of client-side bitrate adaptation algorithms to maximize single-player QoE. However, multiplayer QoE fairness becomes critical as the growth of video traffic makes it more likely that multiple players share a bottleneck in the network. Despite several recent proposals,...
Virtualization is necessary first step in realizing cloud computing. Most studies so far have only focused on CPU, memory and disk resources managements in the cloud environment. Hence, there is still no efficient tuning mechanism for bandwidth resource allocation. Cloud platform often encounters poorer performance in network processing that leads to lower quality of services because bandwidth resources...
In this paper we consider the problem of channel allocation for users who access a common channel using OFDMA. The spectrum is divided into subchannels and we assume that the bandwidth of each subchannel is smaller than the coherence bandwidth. This leads to correlations between the channel coefficients for each user. We model these correlated channels as an m-dependent sequence and generate an interference...
Small-cell deployment in licensed and unlicensed spectrum is considered to be one of the key approaches to cope with the ongoing wireless data demand explosion. Compared to traditional cellular base stations with large transmission power, small-cells typically have relatively low transmission power, which makes them attractive for some spectrum bands that have strict power regulations, for example,...
Higher integration lowers total cost of ownership (TCO) in the data center by reducing equipment cost and lowering energy consumption. However, higher integration also makes it difficult to achieve guaranteed quality of service (QoS) for shared resources. Unlike many other resources, memory bandwidth cannot be finely controlled by software in existing systems. As a result, many systems running critical,...
Multipath transport can simultaneously utilize many interfaces of a terminal to maximize the transfer throughput. However, when sharing the same bottleneck link with single-path flows, the multipath flows will occupy more network bandwidth and it will lead to the unfairness of resource allocation. In this paper, we propose a Congestion Control method with Fairness (CCMF) for multipath transport. CCMF...
Channel allocation possibilities of femtocells are analyzed in this work. Femtocells have gained importance in the recent times because of their scope to offer better frequency reuse in cellular systems. They are poised to play their prominent role in future 5G systems also. While allocating the operating frequencies to femtocells, care needs to be taken to avoid interference with neighboring femtocells...
The efficient allocation of multi-interface multi-channel Wireless Mesh Network channel resources is a hot topic recently. Effective channel management mechanisms need to be designed to ensure the full and efficient use of channel resources. In this paper, combined with the channel load that network buyers perceived, the channel reassignment problem of multi-interface multi-channel Wireless Mesh Network...
Regarding the bandwidth allocation of IEEE 802.16j two-hop relay networks, a Dynamic Bandwidth Allocation (DBA) algorithm based on the utility optimization is proposed. During the bandwidth allocation process of relay links, DBA algorithm takes the Quality-of-Service (QoS) requirements of different services into account by means of utility functions came from economic theories. Under the certain constraints,...
This paper examines optimal resource allocation for uncertain communication networks with application to Cyber-Physical Systems (CPS). The aim of the paper is to test the hypothesis that Q-learning can provide an adaptive strategy that reduces or eliminates congestion in a real-time communication network by appropriate channel bandwidth allocation. To demonstrate this, we use a local linear state-space...
In the cloud, the network links are shared among tenants, which makes them easy to get fully congested (overloaded). Overloaded links degrade the performance of tenants' applications, and impose additional costs to the cloud provider. In this paper, we propose a nonlinear bandwidth pricing policy for congestion control in the cloud network. In order to maximize social welfare (i.e., maximize the total...
We study the prototype for fine-grained bandwidth allocating managers (FGBAM) which allot communication bandwidth inside heterogeneous software-defined networks (SDN) based on user-defined policies. FGBAM can be beneficial in enabling Quality-of-Service (QoS) during both normal periods and disaster recovery time. FGBAM consists of two parts: the web-based front end and the back end for enforcing bandwidth...
Cloud service providers are building out geographically distributed networks of datacenters around the world. It is customary for cloud service providers to distribute their data replicas at multiple geographic locations to mitigate user latency and to increase service availability. In this paper, we treat the content distributed from one datacenter to multiple datacenters as a multicast session....
One of the prominent problems in cloud datacenters is the unpredictability of tenants' applications. Although this problem has been recognized, prior solutions do not consider the bandwidth allocation from both the perspective of tenants' network resource requests and the applications' actual network requirements. To address this issue, we present SpongeNet+, a comprehensive solution that consists...
Previously, we proposed the active access-point (AP) configuration algorithm for elastic Wireless Local-Area Network (WLAN) systems using heterogeneous APs. This algorithm activates or deactivates APs depending on traffic demands, assuming that any active AP can use a different channel to avoid interferences among APs. However, the number of non-interfered channels in IEEE 802.11 protocols is limited...
Wavelength division multiplexed optical networks have become an attractive candidate to meet the ever-growing traffic demands in cloud data centers due to the features of large capacity and dynamic reconfiguration capability. While the bandwidth does not affect the makespan of compute-intensive and content-delivery-network applications, it has an impact on data-intensive applications that therefore...
Network Virtualization is receiving more and more attention lately. It allows multiple parallel virtual networks to run on the shared physical infrastructure. In virtual network environment, a set of virtual networks share the resource of a common physical network although each virtual network is isolated from others. Therefore, bandwidth allocation mechanism is one of the important problems for network...
With cloud tenants making greater use of cloud networking infrastructure in a shared manner, there is an increased desire for more efficient bandwidth reservation guarantees. In this paper, we catalog the varied attempts at solving this problem, and propose a novel proposal Bandwidth as a Service.
We report the current status of our work on the hybrid traffic control schemes and service plans exploiting excess bandwidth allocation for the implementation of fully-shared access networks. The current practice of shaping subscriber traffic using a token bucket filter results in a severe waste of network resources in shared access networks, because it cannot allocate excess bandwidth to active subscribers...
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